Jan Boehmermann, host of the late-night "Neo Magazin Royale" on the public ZDF channel is pictured during a TV show of Markus Lanz in Hamburg, Germany, August 21, 2012. REUTERS/Morris Mac Matzen

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BERLIN (Reuters) - German prosecutors said on Tuesday that they had dropped an investigation into a German comedian who was accused of offending a foreign leader after reciting an obscene poem about Turkish President Tayyip Erdogan on national television.

Comedian Jan Boehmermann read out a poem on a satirical show in March suggesting Erdogan engaged in bestiality and watched child pornography, prompting Erdogan to file a complaint with prosecutors that he had been insulted.

The German government had given prosecutors the green light to pursue the case against Boehmermann - a move which brought Chancellor Angela Merkel strong criticism. But prosecutors on Tuesday said they had not found sufficient evidence to support the filing of charges.